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Chem 490A: Proteopedia Assignment

by Kevin Chen 3-3-09

Trypsin
Trypsin is an enzyme that breaks down protein, that is produced in the pancreas and then secreted in to the small intestines. It is a homolog of chymotrypsin and it works by cleaving at the peptide bond after residues with long, positively charged side chains. An aspartate residue which attracts and stabilizes a positively charged arginine or lysine residue in the substrate. The disease of cystic fibrosis is the result of deficiency in transport of trypsin and other digestive enzymes from the pancreas.

Structure
This is the protein Trypsin,it has alpha helices (shown in red) and also beta sheets (shown in blue), also the amphipathic parts of Trypsin are found throught out the molecule. Image of the crystal complex between bovine trypsin and Veronica Hederfolia trypsin found at 2cmy.

Reference- Berg, Tymoczko, Stryer, Biochemistry 6th ed. W.H. Freeman and CO.